Defining Constellation Suit Helmet Field of View Requirements Employing a Mission Segment Based Reduction Process

McFarland, Shane M.

doi:10.4271/2009-01-2496

Cited by 1 publication

(2 citation statements)

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“…As shown previously in Table 1, the Constellation Program has a set of field of view requirements that are more expansive than previous NASA programs (11). Naturally it is of interest to compare the field of view performance of current and previous suits to the new Constellation Program requirement.…”

Section: Constellation Programmentioning

confidence: 99%

“…This may preclude the crew from reconfiguring the helmet from an LEA mode to an emergency egress mode, thus making the more expansive emergency egress FOV requirement the driving case. However, depending on suit architecture and implementation a discrete LEA mode may be possible and therefore, is tracked differently in the Constellation requirement (11).…”

Section: Constellation Programmentioning

confidence: 99%

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A Novel Method for Quantifying Helmeted Field of View of a Space Suit - and What it Means for Constellation

McFarland

2010

40th International Conference on Environmental Systems

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Field of view has always been a design feature paramount to helmet design, and in particular spacesuit design, where the helmet must provide an adequate field of view for a large range of activities, environments, and body positions. Historically, suited field of view has been evaluated either qualitatively in parallel with design or quantitatively using various test methods and protocols. As such, oftentimes legacy suit field of view information is either ambiguous for lack of supporting data or contradictory to other field of view tests performed with different subjects and test methods. This paper serves to document a new field of view testing method that is more reliable and repeatable than its predecessors. It borrows heavily from standard ophthalmologic field of vision tests such as the Goldmann kinetic perimetry test, but is designed specifically for evaluating field of view of a spacesuit helmet. In this test, four suits utilizing three different helmet designs were tested for field of view. Not only do these tests provide more reliable field of view data for legacy and prototype helmet designs, they also provide insight into how helmet design impacts field of view and what this means for the Constellation Project spacesuit helmet, which must meet stringent field of view requirements that are more generous to the crewmember than legacy designs.

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Section: Constellation Programmentioning

confidence: 99%

Section: Constellation Programmentioning

confidence: 99%